Question

What is the radius of circle having centre at (3, –1) and passing through origin.​

Answer 1

Answer:

√10 units

Explanation:

length of radius can be obtained by distance formula i.e

length of radius can be obtained by distance formula i.e √(x²-x1)²+(y²-y¹)²

length of radius can be obtained by distance formula i.e √(x²-x1)²+(y²-y¹)²so it is {(3,-1),(0,0)}

length of radius can be obtained by distance formula i.e √(x²-x1)²+(y²-y¹)²so it is {(3,-1),(0,0)}=√(0-3)²+(0-(-1))²

length of radius can be obtained by distance formula i.e √(x²-x1)²+(y²-y¹)²so it is {(3,-1),(0,0)}=√(0-3)²+(0-(-1))²=√(-3)²+(1)²

length of radius can be obtained by distance formula i.e √(x²-x1)²+(y²-y¹)²so it is {(3,-1),(0,0)}=√(0-3)²+(0-(-1))²=√(-3)²+(1)²=√9+1

length of radius can be obtained by distance formula i.e √(x²-x1)²+(y²-y¹)²so it is {(3,-1),(0,0)}=√(0-3)²+(0-(-1))²=√(-3)²+(1)²=√9+1=√10

so answer is √10 units